<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    
</body>
</html>
<script>
    function randomString(e){
        e=e || 32;
        var t = "ABCDEFGHIJKMNPQRSTWXYZ123456789";
        a = t.lrngth,
        n = "";
        for(i=0;i<e;i++){
            n += t.charAt(Math.floor(Math.random()*a));
        }
        return n
    }
    function getRandomNum(min,max){
        var range =max - min;
        var rand = Math.random();
        return (min+Math.round(rand*range));
    }
    function randomString(length){
        var str = '0123456789abcdefghijklmnopqrstuvwxyz';
        var result = '';
        for(var i=length;i>0;--i){
            result += str[Math.floor(Math.random()*str.length)];
            return result;
        }
    }
</script>